Calculate the expected time and variance for each activity (show your work for each calculation)
Activity Optimistic Most Probable Pessimistic
A 2 5 6
B 1 3 7
C 5 8 10
D 5 11 13
E 3 4 7
F 7 9 13
G 2 5 8
Calculate the probability that the project will be completed in 21 units of time or less based on the following additional information... Expected completion time equals 22.17 and the critical path equals C-F-G. (Show work for every part of your calculation)